Internet Engineering Task Force (IETF) T. Haynes
Request for Comments: 7204 NetApp
Category: Informational April 2014
ISSN: 2070-1721
Requirements for Labeled NFS
Abstract
This memo outlines high-level requirements for the integration of
flexible Mandatory Access Control (MAC) functionality into the
Network File System (NFS) version 4.2 (NFSv4.2). It describes the
level of protections that should be provided over protocol components
and the basic structure of the proposed system. The intent here is
not to present the protocol changes but to describe the environment
in which they reside.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7204.
Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Haynes Informational [Page 1]RFC 7204 ReqLabeledNFS April 2014Table of Contents
1. Introduction ....................................................3
2. Definitions .....................................................3
2.1. Requirements Language ......................................4
3. Requirements ....................................................4
3.1. General ....................................................4
3.2. Security Services ..........................................5
3.3. Label Encoding, Label Format Specifiers, and Label
Checking Authorities .......................................5
3.4. Labeling ...................................................6
3.4.1. Client Labeling .....................................6
3.4.2. Server Labeling .....................................7
3.5. Policy Enforcement .........................................7
3.5.1. Client Enforcement ..................................7
3.5.2. Server Enforcement ..................................8
3.6. Namespace Access ...........................................8
3.7. Upgrading Existing Server ..................................9
4. Modes of Operation ..............................................9
4.1. Full Mode ..................................................9
4.2. Limited Server Mode .......................................10
4.3. Guest Mode ................................................10
5. Use Cases ......................................................11
5.1. Full MAC Labeling Support for Remotely Mounted
File Systems ..............................................11
5.2. MAC Labeling of Virtual Machine Images Stored on
the Network ...............................................11
5.3. Simple Security Label Storage .............................12
5.4. Diskless Linux ............................................12
5.5. Multi-Level Security ......................................13
5.5.1. Full Mode - MAC-Functional Client and Server .......13
5.5.2. MAC-Functional Client ..............................14
5.5.3. MAC-Functional Server ..............................15
6. Security Considerations ........................................15
6.1. Trust Needed for a Community ..............................15
6.2. Guest Mode ................................................15
6.3. MAC-Functional Client Configuration .......................16
7. References .....................................................16